It may be of interest that what purports to be - and I have no reason to think it isn’t - a bookplate of Daniel Dulany Jnr is currently being auctioned on eBay (image and link below). I have no connection with the sale, I should add.
http://www.americanheraldry.org/forums/picture.php?albumid=85&pictureid=2176
He already appears in the AHS Roll of Early American Arms,
http://www.americanheraldry.org/pages/uploads/Roll/dulany2.gif
Thanks, James, nice find. This is consistent with another image I’ve seen of his bookplate in a library collection (don’t recall which one—probably either University of Delaware or Winterthur Museum).
Here are the arms on his tomb at St. Anne’s Church, Annapolis, as mentioned in the other thread.
http://www.americanheraldry.org/forums/attachment.php?attachmentid=1401&stc=1&d=1422811008
Perhaps it’s worth noting that the arms (Dulany quartered with something, in any case) have been used for decades by Dulaney [sic] High School, so named because it overlooks the Dulaney Valley, itself named for the Dulany family: http://dulaneyhs.bcps.org/